Low-latitude mesospheric signatures observed during the 2017 sudden stratospheric warming using the fuke meteor radar and ERA-5,Journal of Atmospheric and Solar-Terrestrial Physics

当前位置： X-MOL 学术 › J. Atmos. Sol. Terr. Phys. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Low-latitude mesospheric signatures observed during the 2017 sudden stratospheric warming using the fuke meteor radar and ERA-5
Journal of Atmospheric and Solar-Terrestrial Physics ( IF 1.8 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.jastp.2020.105352
S. Eswaraiah , Kondapalli Niranjan Kumar , Yong Ha Kim , G. Venkata Chalapathi , Wonseok Lee , Guoying Jiang , Chunxiao Yan , Guotao Yang , M. Venkat Ratnam , P. Vishnu Prasanth , S.V.B. Rao , K. Thyagarajan

Abstract The signature of the low-latitude mesosphere response to the February 2017 minor sudden stratosphere warming (SSW) was detected using the observations of a meteor radar at Fuke (19.5°N, 109.1°E) a low-latitude station in China and ERA-5 data. Radar detected the zonal wind reversal in the mesosphere three days before the SSW event, whereas the ERA-5 does not reproduce the mesospheric wind response at low-latitudes during the 2017 SSW and large discrepancies are found between the mesospheric zonal winds derived from the Fuke radar and ERA-5. The quasi oscillatory pattern was noted in the meridional winds before the SSW event, afterward, the northward winds are significant. We observed the existence of 20–28-day planetary waves (PWs) in the Fuke meteor radar measured mesospheric zonal winds before the SSW and the 2-12-days period PWs before and after the SSW in the meridional winds. The zonal structure and periodicity of the PWs have been verified with the other meteor radar at the Indian tropical station Tirupati (13.63°N, 79.4°E). However, ERA-5 does not capture the PW activity in the mesosphere as radar. The similarities and dissimilarities among the different techniques have been discussed. Therefore, the present study re-emphasizes the strong response of the low-latitude mesosphere to the 2017 minor SSW in a manner similar to the major SSW event.

更新日期：2020-10-01

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11